Sally can paint a room in 9 hours while it takes Steve 6 hours to paint the same room. How long would it take them to paint the room if they worked together?

18/5 hours per room (3.6 hours per room)

Step-by-step explanation:

Sally's rate of work is 1 room in 9 hours = 1/9 room per hour

Steve's rate of work is 1 room in 6 hours = 1/6 room per hour

Their combined rate of work

= 1/9 + 1/6

= 2/18 + 3/18

= 5/18 room per hour.

we take the reciprocal of this to get their rate in hours per room

= (5/18)⁻¹

= 18/5 hours per room (3.6 hours per room)

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.